Character mistake: When the Puppet King first prepares to incinerate the Titans, Starfire (in Raven's body) and Raven (in Starfire's body) watch from a catwalk above. We can hear Starfire gasp and Raven say "No"; but curiously they do so as if they were in their respective actual bodies (i.e. Starfire's body gasps and Raven's body says "No"), whereas for most of this episode each of the girls talk with her own voice in the wrong body.

When Raven telekinetically reassembles the broken chime bead necklace, it has about nine beads and is rather tight, but before and after that the necklaces feature about 13 or 14 beads and are wide enough to fit around the others' necks.

X-X "The Lost Episode": Some other character cameos in the concerto audience include the two English ladies talking about fish in "Revolution", and Dr. Victor Payten, his interviewer, and the soap opera character Rebecca from "Episode 257-494".